package com.example.lzwphoto.config;

import com.example.lzwphoto.common.JacksonObjectMapper;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

/**
 * @Desc: TODO
 * @Author: LvKun
 * @Date: 2024-02-07
 * @Version: 1.0
 */


@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {

   @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
//        创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
//        设置对象转换器， 底层使用jackson 将java对象转为json
        messageConverter.setObjectMapper(new JacksonObjectMapper());
//        将上面的消息转换器对象追加到mvc框架的转换器集合中
        converters.add(0, messageConverter);
    }
}
